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Foundational questions: Raclette or Fondue? 🧀🇨🇭 What is time without entropy? 🕒 || PhD student at quitphysics.info when not stuck hiking in nordic wilderness

Florian Meier

Thanks a lot to Gianmichele Blasi and Géraldine Haack from Uni Geneva, Yuri Minoguchi and @entangledanarchist.bsky.social from Vienna for the amazing collaboration where we combined tools from quantum transport, condensed matter and thermodynamics to arrive at this cool result!

4mo

Therefore, when two excitations (ticks) are too close to each other, the following excitation arrives a bit later, correcting for the previous error. This leads to an exponentially reduced variance growth compared to independent errors.

For independent errors, the timing variance usually grows linearly in time. Here, the fermionic excitations are intrinsically correlated due to the Pauli statistics. This prevents excitations from clustering too closely together but also from being too far apart.

4mo

Florian Meier

4mo

This phenomenon is rooted in the spectral rigidity also encountered in random matrix theory, and ubiquitous in fermionic systems. Thus, rigidity of the resulting time signal in this clock is remarkably robust: thermal noise, disorder, and finite size effects only perturbatively affect the scaling.

4mo

From one tick to the next, small timing uncertainties in clocks usually add up because of the independence of errors. Using fermions tunneling through a quantum wire as clock ticks, we found a way to build a clock where errors cancel out rather than accumulate. arxiv.org/abs/2601.10785

4mo

Florian Meier

The Qalypso School on Quantum Science in Malta returns for its 3rd edition Aug 31 - Sep 4 this year! 🏖️ We have a great line up of lecturers covering Quantum Optimisation, Quantum Thermodynamics and Quantum Gibbs Sampling. Pre-registrations opens today at forms.gle/3NkMJ3Br9V8b... Do Share!

3mo

Can Gottesman–Kitaev–Preskill (GKP) encoding turn homodyne detection into a practical tool for revealing Bell nonlocality? The answer is yes, and in fact GKP states also lead to strong and robust multipartite nonlocality with homodyne detection! Today on arXiv: arxiv.org/abs/2601.16189 1/n.

Glad someone took the time to debunk the (obviously nonsensical) claim that Bell inequalities could be violated w/o entanglement. It is astonishing (to say the least) that this claim was made by experienced authors & that it passed peer review in the first place, does not reflect well on the journal

4mo

9mo

Jake Xuereb

Alex

Nicolai Friis

10 years after its founding, driven by the energy, enthusiasm, & dedication of the community @quantum-journal.bsky.social quietly published paper #2000 some days ago. At least I think this is a big deal, big shout out to the founders & all authors, reviewers, editors, board members & contributors!